水滑石负载银催化剂的制备与其催化性能分析

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1、摘要PreparationandCatalyticPerformanceofSilVerNanoparticleCatalystsSupportedonLayeredD0ubleHydroxidesAbstractOlefin印oxidation，especiallyinthecaseofstyrene，hasatt】?actedincreasinginterestinthefieldsofscienceandindustrialapplication．Recentlyrapidlyrevolvedgreenchemistrymakesitnecessary

2、todevelopahighlye伍cientandfairlyf．acileoxidantmethodforthe印oxidationofstyrene．SuppoIrtedsilvercatalystshavebeenwidelyinVestigatedbecauseofthehi曲catalyticpeI．

3、’onnanceofolefin印oxidation．Layereddoublebydroxides(LDHs)，alsokno、Ⅳnashydrotalcite—likemat舐als，areaclassofpromisingcatalystsa

4、ndsupports．LDHstructureisbasedonbmcite(Mg(0H)2)-likelayersinwhichsomeofmedivalentcationshavebeenreplacedbytriValentcationsgiVingpositiVely-cha略edsheets，endowingLDHswithordered眦ayofhydroxylsitesonsu渤cewhichisabletof．avorOle丘n印oxidation．Inthispresentstlldy，Ag／LDHscatalystswaspr印aredu

5、singafacilechemicalreductionmethod，andtheninVestigatedfortheactivi够andselectivityofthepreparedcatalystsintheliquid-phase印oxidationofstyrene．Themainresultsobtainedareasfollows：1．Usingachemicalreductionmethod，wepr印aredAg／LDHwithdifferentloadingwithAghighlydispersedonthesupport．Bychan

6、gingthepr印arationmethod，wepr印aredA∥LDHcatalystViaroastreductionprocess．IlI北京化工大学硕士学位论文EValuationof印oxidationofstyreneshows也attheAgnanopaniclesinou．rcaseexhibitedahighlyenhancedperfomanceincomp撕sonwiththatpr印aredViaaconVentionalroastreductionprocess．2．ByVaryingreactiontimeandreactio

7、nteIllperatureofA∥LDHscatalystsintheliquid-phase印oxidationofstyrenebyTBHP，theconVersionsofstyreneweremned．ApropercatalyticconditionwiththeoptiInumconVersionofstyreneandtheselectiVityofstyreneoxidewasoptimizedtobeareactiontimeof8haJldareactionteIIlperatllre82℃．KEYWOItDS：Layereddoubl

8、ehydroxide，silVercatalyst，0lefin印oxidation，styrene，catalyticactiVityⅣ目录第一章绪论1．1银催化剂概述⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯l1．1．1银催化剂发展简史⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．1．2银催化剂的制备方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯l1．1．3银催化剂的催化性能⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯41．2复合金属氢氧化物(LDHs)的研究概况⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯·71．2．1LDHs及其衍生物的概述⋯

9、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯·71．2．2